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B. SMITH.

DOCTOR FOR PAPER OALENDER ROLLS. No. 352,665.

Patented Nov. 16, 1886 llllllllllllli'il' IIII mzewm i fizz/922502; X6. flaw! wax/z.

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B. SMITH,

, DOCTOR FOR PAPER GALENDEB. ROLLS. N0. 352,665. 6 P666 66 Nov. 16, 1886 lllllllllllllnn.

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UNTTED STATES PATENT Crates.

RICHARD SMITH, OF SHERBROOKE, QUEBEC, CANADA.

DOCTOR FOR PAPER-CALENDER ROLLS.

SPE CIPIGATION To all whom it may concern:

Be it known that I, RICHARD SMITH, a citizen of the Dominion of Canada, residing at Sherbrooke, in the county of Sherbrooke and Province of Quebec, Canada, have invented certain new and useful Improvements in Doctors for Paper-Calender Rolls; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being bad to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

This invention relates to doctors, so called, particularly that classemployed as deflectors or guides to lead a continuously-traveling endless paper web between and partially around a series of calender, rolls in rapid rotation.

My improvements pertain more especially to the use of doctors employed in the method for guiding an endless paper web between a stack of rolls, which is fully described in Letters Patent No. 327,031, issued to myself on the 29th day of September, 1885. In this invention a system of feed-pipes was arranged longitudinally of and in parallelism with the face of the rolls, alternating upon each side and adapted to deliver a current of air in the direction of the endless paper web as it passes between the rolls in the act of leading it therethrough. I

One feature in myinvention is embodied in constructing the upper thickened portion or back of the doctor hollow, and perforating it lengthwise upon the inner side, or that con tiguous to the face of the rolls with which it co-operates, so that it may deliver a continuous supply of air.

Asccond feature is in pivoting said doctors so that they may be swung away independently from the face of the rolls, while a third feature consists in the particular arrangement of uniting them by adjustable eccentrics to an actuating lever-rod, whereby the entire series of deflectors or doctors may be simultaneously operated to approach, contact with, and there be maintained to co-operate with the calenderrolls during the passage of the endless web around and between the latter. By this same mechanism a converse movement of said doctor can be effected to remove the latter from the rolls in case of repairs or any other existing cause which might require such movement. If so desired, the deflectors may be caused to approach and contact with the rolls only during the time when the web is being conducted through and between them and then withdrawn butin practice I find the surface of the rolls is very materially improved by continuous contact of thedeflectors or doctors thereupon. Lastly, in the spring-mounting 0f the supporting ends of each doctor, whereby when actively employed the latter is kept in continuous contact with the periphery of a roll; hence if the roll rises,owing to a wad of paper or other material passing between said roll and the next adjacent lower one, the doctor, spring-actuated, rises with it and prevents said obstruction from passing up and around the upper roll; hence the wad is compelled to advance downward and continues its passage, as is desired.

The drawingsaccompanying this specification represent in Figure l aperspective view of a portion of a stack of rolls provided with deflector-plates and actuating mechanism embodying my improvements, while Fig. 2 is a transverse section of said stack, looking toward the back side of the paper-machine of which they form a part. Fig. 3 is a perspective view, and Fig. 4 a vertical section, of the device for spring-mounting the doctors. Fig. 5 is a similar section taken transversely on line 00 0c of Fig. 4., while Fig. 6 is a plan of the actuating-eccentrics, their shaft, and the ad-- justable rods connecting them with the series of doctors. Fig.7 is a transverse section of a deflector-plate in an active position with aportion of two co-operating rolls. Figs. 8 and 9 represent the manner of pivoting and uniting the doctors to the air-supply pipe. Fig. 10 is a front elevation. of the adjusting-journals of the doctor P, and Fig. 11 is a section on line y y of Fig. 10. Figs.- 12 and 13 are respectively a front elevation and sectional elevation of the front journal of the doctor 1?,hereinafter described, 1

In said drawings, A A represent the front and rear standards or housings, which support a series of ca1ender-rolls,B B B B ,forming part of a paper-making machine. Said rolls are to be suitably operated, and are in- .tended to receive a continuously-travelin g endless web between and partially around them in the process of calendering, sotermed.

Since my invention and the improvements embodied therein pertain and are applied to a pneumatic system, I have disposed a tubular frame, 0, to be supplied with a continuous current of air from some proper source. Supported by this frame and pivotally attached thereto at their rear extremities are the deflector-plates or doctors D D D arranged in alternating series on each side of the calenderrolls and opposite the points of juncture of the latter with each other. The essential component parts of these doctors consist in a hollow back or rib, a, provided with alongitudinal bore, 1), to which is secured a sheet of metal, a, perforated at d d and bent to conform to the curvature of the roll, which it partially incloses. This back is further provided with supports 0 e,the rearone of which terminates in a flange, f, adapted to-be bolted to a corresponding one, 9, forming part of a sleeve, F, fitting about and movable upon the verticalportion of the tubular frame O,whereby a swinging 0r pivotal movement is secured, and the doctors can be swung toward or away from the calender-rolls, or easily removed in case of needed repairs.

The curved deflector-plates or shields I prefer to make of two kinds of metal, employing steel for the upper portion, which is in conand thereby permit adjustment thereon of the flanged head f, which forms part of the doctor. Thus the position of the latter may be easily altered with respect to its roll. Adjustment of the flanged sleeves F F is obtained by means of split screw-clamps t t.

The front supporting-arm, e, of each doctor is mounted upon a bracket, G, which correspond in number to that of the doctors employed, or to the number of rolls in the calender-stack. Said brackets are capable of adjustment upon and are bolted to cheek-pieces I I, permanently attached to the inside face of the front standard, A. These cheek-pieces are likewise slotted at h h, and the proper position of the brackets is thereby easily and readily obtained. Furthermore, these brackets are vertically slotted at 12 z',to receive similarly-formed projecting ribs, adapted to secure the movable gib j. Between the latter and the bracket are placed coiled springs k k,

while to maintain the gib in position and still to permit it vertical motion, induced. by the bracket, m, which rests on the movable spring- I actuated gib k. Thus the action of the latter is to maintain the doctor with which it cooperates normally in contact with a roll when the doctor is actively disposed. Removable locking-pins o 0 are disposed in said brackets m m and engage the arms e e of the doctors; Thus in case the latter require to be swung away from the rolls for any purpose this movement can be easily accomplished by removing said pins, when the doctor is free to swing.

To operate the entire series of doctors on each side of the roll-stack simultaneously and maintain them continuously in contact with said rolls, or to remove them therefrom, as circumstances may require, I have arranged and combined together the following instrument-alities: This mechanism consists, primarily, in an upright or vertical post or shaft, J, which may be secured to the front standard in any convenient position to enable the opera-' tive to easily alter the doctors to any position required. Upon this shaft are mounted a series of eccentrics or disks, n n n", to one of which is secured an actuating lever-bar, K. These hubs, above mentioned, are securely affixed to and adjustable upon the shaft J, and are peripherally slotted to receive and hold circumferentially-disposed loose rings 1) 1), (see Fig; 4,) which are furnished with radiallyprojecting screw-threaded rods q q, adj ustably united to right and left couplings 1* r. The latter engage with connecting-rods 88, secured to the doctors by the locking-pins o 0, which fit in the bracket-arms m m. The doctors thus are all united and cooperate simultaneously as an entirety and in a similar manner; but since the shaft J is upon one side of the standard A obviate this difficulty I have oppositely arranged two doctors, 13- P, constructed in the usual manner, and have adjustably mounted them both front and rear upon the standards A A. The journal adjustment of the doctor P is shown in Figs. 10, 11 as composed of two circular plates or disks, 2 3. The former or bracket portion is provided with a lateral shoulder, and thereby is firmly bolted to the standard A. Upon the plane face of this disk 2 is adjustably secured the face-plate 3, pro-,

vided with an eccentrically-disposed bearing,

4, which receives the journal of the doctor P.

This arrangement is duplicated both front and rear. Adjustment of saiddoctor relatively to playing therein and adapted to clamp it to the bracket-disk 2 in any desired position. The front adjustment of the upper doctor, P, is somewhat similarly produced by means of a plate, 6, afixed to the cheek-piece I, while a bearing-disk, 7, carrying the j ournal 8, in which said doctor is mounted, is aftlxed thereto by means of the slots 9 Qand the clamping-bolts which hold said disk 7 in any desired position. This arrangement of parts is shown in Figs. 12 and 13 of the drawings. The rear support of this doctor 1? is a simple pivot upon the rear standard.

I claim- 1. A deflectorplate or doctor composed of a tubular back or rib to which is secured a curved metallic plate, the latter provided longitudinally with apertures opening into the tubular rib, whereby a flow of air may be continuously discharged, substantially for purposes herein described.

a 2. Iwo continuously-rotating rolls, one partially inclosed by and the other in contact with a deflector-plate or doctor, in combination with said deflector plate pivotally mounted and swinging in horizontal paths of movement toward or away from the rolls, for

, ated deflectorplates oppositely and serially arranged on either side thereof, said deflectorplates alternating at themeeting surfaces of the rolls and adapted to supply air continuously, substantially for the purposes described. 4. In combination with a pair of revolving rolls, a pivotally-mounted doctor composed of a tubular back, to which is secured a curved metallic plate, the latter to contact against the upper roll and partially inclose but not touch the lower roll, substantially as herein stated.

5. The series of revolving rolls provided with a series of alternately oppositely-disposed pivotally-arranged doctors, in combination with the actuating-shaft, eccentric-disks, and connecting-rods united with the doctors,whereby simultaneous movements of the latter are effected, substantially as herein stated.

V 6. In combination with a series of continutubular rib, a, pivotally mounted, of the slidv ing gib j, bracket G, and actuating-rod J,with its connecting mechanism, all operating substantially as described.

8. In combination with a pair of revolving rolls adapted to receive and pass between them a continuous paper web, the doctors longitudinally disposed thereof,but oppositely inclined and adjusted to rest in contact with said rolls while i n rotation, substantially as herein stated.

9. In combination with a pair of rolls, the deflector-plate I.) and the shaft J, provided with the'eccentric-hub n, ring 1;, and screwthreaded rod q, the rod s, adjustably connected with the .doctor by the coupling 1", substantially as described.

10. The cheek-pieces I and the bracket G, which supports one end of the doctor D, in combination with the gib j, its springs k k, and the terminal support 6 of said doctor, whereby vertical movement thereof is obtained, substantially for purposes herein set forth.

1 1. In combination with two adjacent rolls and the doctors vertically disposed as to each other, but oppositely and permanently inclined against the surface of said rolls, the adjustable disks 2 2 and face-plates 3 3, slotted at 5 5, and carrying thejournals 4 4, all operating as herein described.

12. The combination, with two adjacentrolls and the oppositely-inclined doctors, longitudinally arranged and normally resting thereon, of the supporting-plates 6 6, slotted disks 7 7, and journals 8 8, substantially as and for the purposes stated.

In testimony whereof I affix my signature in presence of two witnesses.

RICHARD SMITH. 

